These units are compact gearboxes that are available in a range of sizes and capacities.

Up to 500 Hp and with ratios from 1:1 to 70:1 and output speeds up to 2400 rpm. Efficiencies per reduction stage are approximately 97.5%.
The input drive can be an electric motor or hydraulic motor and with varying shaft drive and mounting options.
When selecting any gearbox, it is essential to study the supplier’s technical literature. This will guide you through the process and will consider the applications load and service factors, speeds and transmitted torque & power values etc. Accurate certified drawings will provide key dimensions to ensure a problem free design and installation process.
The data below forms only one part of the selection procedure from the drive manufacturer and may be specific to this design of gearbox only. These tables ensure a selected drive unit is sufficiently robust in operation to provide a long and reliable service life.

The figure below outlines some of the gearboxes input mounting details for a hydraulic or electric motor.

The Input Bushing Sizes table shown below lists the various drive interface connection details, where KW denotes keyway and Spline denotes a splined drive along with specifications of each type.

The diagram below shows the difference between a splined bore and a keyway bore. The number of teeth in a spline will vary depending upon specification.